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HF Transceiver
Marine Shortwave receiver IMR54
Enhanced Conventional Portable Radio

General

HAM bands 40m  ? 2m  70cm 
Freq. stability ? ? ±1.5ppm
Tuning steps Continuous ? 12.5KHz/ 25KHz

Receiver

RX-range 7.0-7.1 MHz 15 kHz - 31 MHz in 10 bands 136-174MHz / 350-390MHz / 400-480MHz / 450-520MHz
Modulations CW   AM   CW   -
Sensitivity ? 15-160 kHz: 4-20 µV (10 dB S/N)
160-1500 kHz: 6-10 µV (10 dB S/N)
1.5-4 MHz: 1.5-3 µV (10 dB S/N)
4-10 MHz: 2-6 µV (10 dB S/N)
10-31 MHz: 2-10 µV (10 dB S/N)
5% BER: 0.25 µV
Selectivity ? Wide, Intermediate, Narrow and Very narrow settings.
500 Hz ... 25 kHz
60dB
Filters ? ? ?
Receiver system ? Double conversion superheterodyne ?
IF-freqs. ? ? ?
Image rejection ? ? ?
Audio output ? 1 W ?

Transmitter

TX-range 7.0-7.1 MHz - 136-174MHz / 350-390MHz / 400-480MHz / 450-520MHz
Modulations CW   - -
RF-output 1 W ? ?

Connections

Antenna - - -
Impedance 50Ω 72Ω 50ΩΩ
Other - - -

Electrical

Power req. 13.5V DC Mains (110-250 V AC) ?
Current RX ? 82 W ?
TX ? - ?

Physical

Manufactured Between 1975 and 19xx in Japan Between 1952 and 195x in Great Britain Between and in China
Dimensions 202 × 65 × 173 mm
(7.95 × 2.56 × 6.81 in)
747 × 385 × 451 mm
(29.41 × 15.16 × 17.76 in)
60.8 × 35.7 × 118.5 mm
(2.39 × 1.41 × 4.67 in)
Weight ? 60.90 kg (134.4 lbs) 239 gr (8.4 oz) including battery
Form factor Mobile Base Station Portable

Other features

Memories None ? ?
Usage Amateur / Ham radio operators Marine / Navy Commercial / Land mobile communication
Features ? Automatic volume control Mandown
Lone Worker
Emergency Alarms
Advanced Encryption with RC4 Technology
DMO True 2-slot, Allowing for 2 Talk Paths at 1 Frequency
Transmit Interrupt/Radio Priority for Emergency or Urgent Communication
Integrated High Precision GPS
Accessories ? ? Battery
Belt Clip
Hand Strap
Stubby Antenna
Charger
MPN MIZUHO-DC-000007D EDDYSTONE-000700 BELFONE-BF-TD000511